Inorder to use the later Jag style mirrors on the Interceptor, you must use this spacer plinth positioned between the mirror base and door skin so that the mirror sets at the proper angle. These are of milled aluminum and look pretty snazzy all by themselves! Jensen painted these black but some people paint them the same color as the car. Polish 'em up and it'll just look like its part of the mirror! It's like JEWELRY for the car! This item is for the left and for the right.